Device for aiding combustion.



M. ZENTNER;

DEVICE FOR AIDING COMBUSTION. APPLICATION FILED ocr. 8. 1918.

1,295,666. Patented Feb. 25, 1919.

INVENTOR /////Zy Z172? ATTOTiNEY citizen of the United States, and resident of.

UNITED STATES PATENT OFFICE,

MATHEW ZENTNER, F OSHKOSH, WISCONSIN.

DEVICE FOR AIlDING ooM s'rIoNf To all whom it may concern? Be it known that I, MATHEW Znxrxnn, a

Oshkosh, in the county of \Vinnebago and State of Wisconsim have invented certain new and useful Improvements in Devices for Aiding Combustion; and I do hereby declare that the following is afull, clear, and exact description thereof.

My invention relates to new and useful im n-ovements in devices for aiding combustion in afurnace. by the discharge of air into the combustion chamber of the furnace above the g1ate,'said air supplying suflicient oxygen to consume the soot and hydro-carbon gases which rise from the fire, and my invention is directed more particularly to the provision of such a device which is particularly applicable to furnaces of the type used in domestic heating plants.

It is primarily the object of my invention to provide a combustion aiding device of thischaracter which may be applied in a most ready manner to domestic furnaces, and my object resides more particularly in the provision of a device adapted to convey air into the combustion chamber which may be attached to the door of the fire box whereby to permit the installation of the devicein a manner necessitating ahninimum amount of modification of the furnace structure, and

avoid the necessity of piercing the walls of.

the furnace.

A further and important object resides in the provision offa combustion aiding de vice adapted to supply air to the combustion chamber in a heated condition whereby a maximum efficiency is afforded in burning the soot and gases which would otherwise go to waste.

With the above and other objects and advantages in view, which will be apparent as the description proceeds. my invention resides in the novel features of construction, combination and arrangement of parts as hereinafter described and defined by the appended claims.

In the accompanying drawings:

Figure 1 is a vertical sectional view through a combustion aiding device embodying my invention.

Fig. 2 is a partly sectional view of a flu nace showing the installation of my improved device therein, said device being in elevation.

Referring now more particularly to the Specification of Letters Patent.

accompanying drawings, 5 designates the outer casing of a conventional domestic type of furnace for heating processes, and Gdesig- Patented Feb. 25, 1919. Application filed October 8, 1918. Serial No. 257,392. i

sage-way 7 to the front of the casing 5, this passage-way being normally closed by the usual fire door 8..

My improved air distributing device is adapted to project through one of the vent apertures of the door, or through an open-- mg cut in the door should no vent aperture be available- The device comprises a heat'" ng chamber formed of inner and outer OHS-"- lng sections 9 and '10 respectively, the outer-u easing section being adapted to project through the opening of the: fire door. The walls of the casing sections abut and the casing sections are secured together and to the door 8 by bolts 11 passed through out.- turned mating flanges 12' on the side walls of the casing sections, and through the door.

8. The end wall of the outer casing section 10 is provided with an outwardly extending intake nipple 13, and the end wall of the inner casing section 9 is provided with a discharge port 14. To prevent direct passage of air from the intake nipple 13 to'the out-- let port 14, and at the same time to afford. a maximum expanse of heating surface for air passing through the casing. partition ans 15 extend transversely between the side walls of the casing. said partition walls' terminating short of the top and bottom of the casin and being connected by top and bottom partitions 16. A transverse passageway in the casing is thus provided which forms a battle within the casing. and which is open at its ends for communication with the main door passage-way of the combustion chamber whereby circulation of heated gases may be procured through the casing to procure a'maximum heating action of air supplied thereto.

Extending inwardly from the discharge port H of the heater casing is a duct 1? which is secured to the casing. by out-turned end flanges 19, and this duct terminates in an enlarged hemispherical head 20, the rounded portion of said head being provided with a narrow slit 21 lying in a horizontal plane and extending throughout substantially the entire periphery of the head. A longitudinally elongated passage-way 22 is formed in the duct 17 which is open at the sides of the duct to the combustion chamber lar to the passage-way partitions 15 and 16. I

The topmnd bottomof the passage-way 5 are disposed horizontally whereby the 'passage-way prevents direct flow of air through,

the slit, and air passing through the duct is thereby directed against the heinispherlcal Wall of the head, subjected to a high degree 9 10 of heat, and finally discharged from t the head in a fan-shaped stream by the accumulation of pressure in the head.

The duct is of such length that the head 20 lies within the combustion chamber at the forward side thereof. and thus in the opera tion of my device a fan-shaped stream of heated air is discharged horizontally across the combustion chamber, to supply sufficient oxygen under proper heat conditions to effeet the combustion of sootor waste gases which would otherwise escape from the combustion chamber, with the consequent famil- .iar disadvantage of acclnnulation of soot in the furnace and flues, and loss of heat incidental both to imperfect combustion and to the heat insulating action of the soot when accumulated upon the heat radiating sur faces.

An exceedingly simple device has thusv been provlded wlnch may be most readily installed in a: conventional type of domestic furnace, and which will efficiently heat a constant supply of air and discharge 1t into the combustion chamber under the most of.

fective conditions. The entire device being carried bythe furnace door, obviously moves with the door, and the duct 17 by reason of its removable connection with the heater casing secured to the door may be readily replaced should it become burned out, and dif fering types of duct foruse in connection with differing.conventional forms of furnaces may be employed with a single standard heater casin It isfurther noted that 4J5; by the proje-ctiol'rof aportion of the heater casing outwardly ofthe furnace, a maxi-' mum volume of the casing is afforded, the

outer por'tionofthe casing being heated by conduction.

I claimr l. A combustion aiding device comprising i a duct provided at one end with an air distributing slit, and means for connecting the vided with a transverse passage-way therethrough forming a baffle plate for air passing-through the duct and additional heating surfaces for said air.

2. A combustionaiding device comprising a duct adapted for securelnent to a furnace to project thereinto and having communica-.

tion with the air at one end and provided with an air distributing slit at its other end, and a passage-way extending transversely through the duct and forming a baffle for air passing through the duct and additional heating surfaces for said air.

3. A combustion aiding device'comprising a casing formed in sections, one of said sections heingadaptcd to project through the apertureof a furnace door, mating flanges on adjacent wall portions of the sections, bolts passed through said flanges and adapted to secure the casing to a furnace door, and air distributing means carried by the other casing section.

4. A combustion aiding device comprising a casing formed in sections, one of said sections being adapted to project through the aperture of a furnace door, mating flanges on adjacent wall portionsof the sections, bolts )assed through said flanges and adapted to secure the casingto a furnace door, air distributing means carried by the other casing section, and. a duct having one end detachably secured to the other section of the casing and provided with an air distributing slit at its other end.

.In testimony that I claim the foregoing I have hereunto set my hand at Oshkosh, in

the county of \Vinnebago and State of lViscons-in.

MATHEW ZENTNER.

other end of the duct witha furnace-door, to move with said door, said duct be ng pro 

